// ===========================================================================
//	Vector2D.java	1996 Yushin Hozumi All rights reserved.
//					Author:Yushin Hozumi
// ===========================================================================

package	StudioRAIN.geometry;

public class Vector2D
{
	private float x = 0F;
	private float y = 0F;

	public Vector2D() { x = y = 0F; }
	public Vector2D( float inD ) { x = y = inD; }
	public Vector2D( float inX, float inY ) { x = inX; y = inY; }
	public Vector2D( Vector2D inV ) { x = inV.x; y = inV.y; }

	public float getX() { return x; }
	public float getY() { return y; }

	public void setX( float inX ) { x = inX; }
	public void setY( float inY ) { y = inY; }

	public Vector2D add( Vector2D inV ) { x += inV.getX(); y += inV.getY(); return this; }
	public Vector2D sub( Vector2D inV ) { x -= inV.getX(); y -= inV.getY(); return this; }
	public Vector2D sum( Vector2D inV ) { return new Vector2D( x + inV.getX(), y += inV.getY() ); }
	public Vector2D difference( Vector2D inV ) { return new Vector2D( x - inV.getX(), y - inV.getY() ); }
	public Vector2D schalarMultiple( float inS ) { x *= inS; y *= inS; return this; }

	public float innerProduct( Vector2D inV ) { return x * inV.getX() + y * inV.getY(); }
	public float outerProduct( Vector2D inV ) { return x * inV.getY() - y * inV.getX(); }

	public void incrementX() { x++; }
	public void incrementY() { y++; }

	public void decrementX() { x--; }
	public void decrementY() { y--; }

	public void addToX( float inValue ) { x += inValue; }
	public void addToY( float inValue ) { y += inValue; }

	public void subtractFromX( float inValue ) { x -= inValue; }
	public void subtractFromY( float inValue ) { y -= inValue; }

	public void multiplyXBy( float inValue ) { x *= inValue; }
	public void multiplyYBy( float inValue ) { y *= inValue; }

	public void divideXBy( float inValue ) { x /= inValue; }
	public void divideYBy( float inValue ) { y /= inValue; }
}